Bonnie, you have a PowerPC Mac and the latest Flash versions are for Intel Macs only. Adobe stopped supporting Flash for PowerPC Mac years ago. I think the last version to support PowerPC was 10.1.102.64.
There is a hack that you can find here in this forum that will change the version number of Flash to read as a version of 11.x.something. But that's just a hack and does not actually change the actual version. It's good enough to fool websites in to thinking that you have the latest version though.
Do a search on this forum for it.